Battery and emergency start switch issue

[Berettadog]

Hello Everyone

My 1997 33 EC has recently developed some electrical gremlins.
I have to use the jump switch to start the Starboard motor.
Both batteries have been checked and are good.
Also, after i start it, it appears as though the Starboard motor is running of the Port battery as there is a draw on the Port volt gage on the dash when the Starboard motor is running.
When i turn off the Starboard motor the gage jumps up a couple volts.

While investigating the issue I disconnected the Port Battery completely and tried starting the Starboard motor, it did not start. I did hear a click when i tried starting it.
With the Port battery disconnected, I then engaged the Emergency start switch and the Starboard motor started right up, but would shut off as soon as I let go of the switch.

I did replace the Emergency Start solenoid with a new one.

Any help is greatly appreciated!

 

[Frank Poppinga]

I also have an emergency start switch. Normal cabling is from each battery to the battery selector, to the starter and from each starter to the emergency start relay. If you can start it from the relay but turns off when released, you already know what that means - you have no power from the normal wiring. The relay also supplies ignition power when on. I would do the following using a volt meter:
Clamp the negative test lead to battery negative post. This is important because you can also lose your negative connection.
Now place positive lead on battery plus terminal. Crank (try to start the engine). Record the voltage before and during cranking. Somewhere around 12.6 volts is good. While cranking, the voltage should drop to 12 or a bit less depending on battery charge, starter, etc. However, if the voltage takes a dive, you have a bad starter, battery or connection depending on where you are testing. A bad connection could read full battery voltage until you apply a load and then drop to nothing.
Next, test at the battery switch in and out - the starter.
The beauty is, you have a working engine that you can compare the readings to.
Hope's this helps and you have it fixed by now.
Frank

 

[Bt Doctur]

Guessing you have twin engines ,each with it`s own battery and own battery switch.
Starboard battery switch is off
I would hope you have true dual electrical systems